Welding and cutting blowpipe.



E. C. MARTIN.

WEL/uma AND CuTTlNG BLowPlPE.

ARPLICATION FILED JUNE 8, 1916.

Patented Aug. 21, 1917 f- TE@ STATE@ PATENT TTTQE. i

Enc-AR `C.MARTIN, OE CENTRAL, SOUTH CAROLINA, AssIGNoR To PRATT a cADY COMPANY, INCORPORATED, or' HARTFORD, CONNECTICUT, A CORPORATION or NEW YORK.

To all whom t may concern: X

Be `it known that 1, EDGAR MARTIN, a citizen of the. United States, and resident of Central, Pickens county, South Carolina, have' made a. certain new and useful Invention Relating to Welding and Cutting Blowpipes, of which the following is a speciiication, taken in connection with the accompa- .n 'inw drawin0r which forms art of the ,Figure 1 Ais a vertical longitudinal sec tion. v Fig. 2 is an enlarged sectional detail showing the valve actuating devices.

Fig. 3 is a transverse sectional view taken Usnbstantially alongthe line 3*?) of Fig. 1.

' Fig 4 is a horizontal sectional detail 'taken substantially along the line 44jlof Fig. 1.

Fig. 5 is a vertical section showingthe regulating valves'v I Fig. 6 is a sectional detail showing the shut-Off valve; and

'Fig'. 7 is a sectional detail showing a modified valve actuating device.

The blowpipe may have any desired construction and may comprise a stem 1 screwed orotherwise secured to the head 4 into which may also be screwed thetube 2 having, if desired, a screw connectionuat its rear end with the iiange 9 on the junction member G0. The stein may also engage this junction member and b'e solderedor otherwise connected thereto, ifdesired, a suitable annular recess 62 and communicating passage 68 being preferably formed in this member for the passage of heating gas/Or gase's from the tubular ,connection 73 into the annular space between the tube :land stein 1 as shown in' Figs. 1 and 4. The oirygen or other supporter of combustion/folli' these heating gases n'i'ay, if desired, be supplied from Specification of Letters Patent.

retreated Aug. 2i, ieri.

Application filed .Tune 8, 1916. Serial No. 102,483.

the tpbular connection 72 to the passage 69 communicating with the inside of the tube 2 so as to supply this oxygen, for instance, to the head. These tubular connectioiis 72, 73 which may, if desired, be screwed into the junction member 5 at the rear of theI blowpipe which may be formed with suitable gas nipples or connections S for the acetylene or other heating gas and forthe Oxygen or supporter of combustion therefor, the holes in these nipples communicating in each case with a passage, such as 28, and communicating valve passage27 with which may coperate a suitable regulatng valve of any desireddescription so as to regulate the supply of/these gases to thefblowpipe through the connected valve handles 21, 2Q.4 If desired,l these regulating/'valves may be' of' the.

ball valve type as indicated and may comprise the valve plug.f70 which may be threaded within the valve casing, provided, if desired, with the gland bushings 65, (36"between which thepacl/ring 24 may be held as by the nut 23. Thus when the handle 22 on the valve tem 25 is rotated the valve plug 70 is ad/vanced a corresponding distance toward the valve seat 154 and the ball valve Q9 is carried forward correspondingly. The valve may, if desired, be loosely mou-,nted within the valve plug so as to give a self-alining action a' d allow it to seat itself accurately as it is "pushed forward by the aliniiig actuating surface 153 which is preferably parallel to the valve seat 154 and of sufficient extent to allow some slight lateral adjustment of the valve within its socket in the.

plug. As indicated a suitable passage, such as 2G, from the valve seat may communicate with the tubular connection, such as 72 so as to carry the oxygen or other burning gases to the junction member and head. The acetylene is supplied through the acetylene passage 46 to the injector casing 36 which may be formed in the removable cutit'ng tip 40. The acetylene may then be drawn by the oxygen jet suppliedthrough the passages 47 and injector nozzle 37 into the heating passage 38 which may communicate with the annular space 42 within the casing 45 screwed at 41 to the tip 40 and similarly secured to the end 43. This mixed oxygen and acetylene, for instance, may thus supply the series of heating jet discharge conduits 44 around the central cutting jet 39 at the end of the tip. Inorder to readily secure 50 f vactuator rod 3 connected to this caminay: packing gland 6 and" fpacking 7 in the junction member 60 andA as indicated so as to tightly 4 same time the'valve is held provide the valve plu the removable cutting tip in position the securing collar 49 may be screwed on the head hold the cop erating flange 64 on the tip and force the reduced area junction members on' the tip' and head into engagement. These junction or joint members may, for instance, comprise the reduced area 4flange 63 on the head with which the-fiat coperating end of the tip may be forced .into tight enga ement and it is desirable to form the tip wit a projecting ,protecting ledge 35 aroiind the joint area thereof so as to prevent distortion of this 'part of the ti by accidental falls or the like.

Theshutb valve is preferably located in the head of the blowpipe so as to coperate with the cutting passage 39 which mayz if desired, be axially located within the cutting tip. In this way whenever one of these replaceable cutting tips 'is secured in the head its cutting passage is simultaneously-bron valvd'whelrimaywwith advantage be of the ball valve type and loosely mounted so as to have an automatic alining action promoting the tight closure of the cutting `passage in the tip. 'if desired this valve may be loosely mounted in a valve plug, or support, such as 31, guided in a suitable recess 33, and ,extension 93 thereof in the had, and for some purposes this shut-od valve may have 'a normally closing tendency or be forced into closed position as by the spring 48 in this recess. Itis desirable to provide this shut-'0E valve with a loosely mounted ball valve 50 cooperating with the valve seat 54 in the tip as indicated in Figs. 1 and 6, so that any slight lack oalineinent between the' valve plug and seat may be compensated for and the tight closure of this ogygen shut-off valve insured under operating conditions. For this purpose the valve socket 51 is of such size and form as to allow some slight lateral movement of the valve, a hundredth of an-inch or so play on both sides of the valve being desirable, while at the by the inwardly Hanged over or bent holding ilange 52. It is desirable in orderto insure the eilective closing of the valve to or support with an alining actuating'sur ace, such as 53, preff erably substantially parallel to the valve extend through the seat 54 so that thevalve is forced evenly home against its seat under `all, conditions.

' This shut-off valve maybe opened by any .suitable actuating devices, and, for' example, an actuator cam 32 may be mounted in the recess 34 in the head and may coperate With the inclined slret 32 in the valve plug. The

may be longitudinallyv moved by a suitable may 'the end19 in the plug as.

tion and also pin 16 in the lever bracket 10 secured to or formed inte al withthe junction member 60 and the ree endof this lever may, for example, extend through a lever slot 11 in thel tubular handle 14 secured as by the screws 67 on the connector member so that a thumb end of this lever is always convenient for actuation by the thumb of the operator. If desired, this actuator lever may beof the biurcated or extend around a suitable slotted nut or head 18 adjustably screwed on the threaded end 19 of the actuator rod so ythat the rounded or enlarged actuating portions 13 of this lever may ie between and coperate with the flanges 17, 20 on this nut as seen in Figs.

1 and 2. Thus when the thumb piece 12 is movgdbackward into the dotted line posii y ghi tin' theniut and connected actuatorl rod 3 intogsubstantial alinemcnt'vvith the shut-od are longitudinally moved to a corresponding extent, thus opening the shut-oli valve 50.

piece orl enlargement 12 on the' yoke form shown in Fig. 3 and The increased leverage-secured in this way enables the operator to quickly and certainly operate the shut-off valve under working conditions. vAnother form of which may be used in this same is shown in Fig. 7 as pivoted at its intermediate porti about the pin 75 fin the l/ever bracket 10 w ilev its vbifurcated free ends 761 are given a to enga e and longitudinally mov the flanges l 20 on the slotted nut screwed on .of the actuator rod 3. The shutofi' valve Inay'thus be moved by oscillating the thumb pieco-.,12, a'forward movement of this thumb piece o enin the shutoff valve in this instance, w ile w en the thumb piece is moved into the rearward position indicated in, Fig. 7 the shut-off valve is closed.

Under some operating conditions it is desirable to have a shield for the operators hand interposed between the tip of the cutgeneral way ting or welding blowpipe and the handle and it is of considerable advantage to have such a shield detachable and so arranged as to be readily and quickly secured in posiangularly adjusted in some in stances about the blowpipe handle, as more fully illustrated and described in. my copending application, May 17, 1916, Which'claims this shield construction. For this purpose the shield 15 which may be of any suitable metal or material and if desired strengthened by forming reinforcing ribs therein as indicated, mayV alining recess or 4 'aperture, such as 57, adapted to loosely enbe formed with v a `circular 'circle the cooperating part of the blowpipe VA,sd-*as to be clamped in position thereon as by the retaining collar 59 which may be threaded yon the vforward extension or actuator lever asl rounded enlarged forn'i'so as Serial No. 98,020, filed threaded neck 6l of the junction member 60. 130

It is also desirable to form suitable locking lugs, such as 55, on the shield adjacent this aperture, a series oitl such lugs being desirable and preferably formed of such size as to extend within the locking recess 58 on the blowpipe member. ln this way the shield may be readily attached tothe blowpipe and securely held thereto by the interlocking action .of the locking lugs and recess while by slightly loosening the` retainer collar 59 the shield may be swung angularly about the handle of the blowpipe into any desired angular position in which it may be instantly clamped or locked. At-fthe same time the shield may be entirely removed from the blowpipe since the operator may manually unscrew the retaining collar 59 without the use ot' lany special tools and this retainer collar may then be screwed tightly home against the end of the handle lil, thus giving a finished appearance to this part of the device when the shield is not in use.

This invention has been described in connection with a number of embodiments, forms,A arrangements, proportions, parts, materials and devices, to the details of which disclosure the invention is not of course to said head, an interchangeable tip removably mounted in said head and formed with a central shut-ofi valve seat, a recess in said head substantially in line with said valve seat, a spring-,pressed valve plug mounted in said recess, a ball shut-oft' valve loosely mounted in said valve plug to coperate with said valve sea-t and actuating devices for said shut-ott valve comprising an actuator rod l cooperating with said plug, a slotted nut on said rod, an actuator lever having its end pivoted within saidhandle and having en-A larged actuatin portions engaging the slots on both sides oV said nut, said lever projecting through a slot in said handle and being formed with a thumb piece.

2. The cutting or. welding blowpipe comprising a handle, a head connected thereto,

meansito supply oxygen and heating gas to said head, an interchangeable tip removably mounted in said head and formed with a shut-oil' valve seat, a recess in said head substantially in line with said valve seat, a spring-pressed valve plug mounted` in said recess, a shut-oil valve loosely mounted in said valve plug to coperate with said valve seat and actuating devices for said shut-off valve comprising an actuator rod coperating with said plug, a slotted nut on said rod, an actuator lever pivoted within said handle `and having enlarged actuating portions, en-

gaging the slots on both sides of said nut, said lever projecting through a slot in said handle and being formed with a thumb piece. v

The cutting or welding blowpipe comprising a handle, a head connected thereto, means to supply oxygen and heating gas to said head, an interchangeable tip removably mounted in Said head and formed with a shut-ntl' valve seat, a recess in said head substantially in line with said valve seat, a valve plug i iounted in said recess, a shut-ott valve loosely mounted in said valve plug to coperate with said valve seat and actuating devices for said shut-oli valve comprising an actuator rod cooperating with said plug, a slotted nut on said rod, an actuator lever pivoted within said handle and having actuating portions engaging the slots on both sides of said nut, said lever projecting through a slot in said handle.

4. rlhe cutting or welding blowpipe comprising a hollow handle, a head connected thereto, means to supply oxygen and heating gas to said head, an interchangeable tip removably mounted in said head and formed with a shut-ofi' valve seat, a spring-closed valve mounted in said head to cooperate with said valve seat and actuating devices for said shut-olic valve comprising an actuator rod vcooperating with said valve, a slotted member on said rod, an actuator lever hav- I ing its end pivoted within said handle and having enlarged actuating portions engaging the slots on both sides of said member, said lever projecting from said handle. y

The cutting or welding blowpipe'comprising a hollow handle, a headconnected thereto, means to supply oxygen and heating gas to said head, a tip mounted in said head and formed with a shut-off valve seat, a spring-closed valve mounted in said head to ceperate with said valve seat and actuating devices for said shut-oit valve comprising an actuator rod coperating with said valve, a slotted member on said rod,

an actuator lever pivoted within said handle and having actuating portions engaging the slots on both sides ot'said member, said lever projecting from said handle.

5. The cutting or'welding blowpipe comprising a hollow handle, a head connected ,lthereto, means to supply oxygen and heating gas to said head; a tip mounted in said head and formed with 'a shut-oit valve seat, a valve mounted in said head to cooperate with said valve seat and actuating devices for said shut-oit valve comprising an actuator rod coperating with said valve, a member on said rod, an actuatorlever pivoted within said handle and having actuating portions engaging said member, said lever projecting from said handle.

' The cutting or Welding blowpipe comprising a tubular handle, a head connected a thumb piece.

8. The cutting or Welding blovvpipe comprising a tubular handle, a head connected thereto, means to supply gas to said head, a pressed shut-oil' valve mounted inl said head and actuating devices for said shutol' valve" comprising an actuator rod extending through a tight packed joint into said handle, a slotted nut.on said rod, an

. actuator lever having its end pivoted Within said handle and having actuatin portions engaging the slots on both sides o said nut, said lever projecting through a slot in said handle and being formed with a thumb piece.

9. The cutting or Welding blowpipe comprising a tubular handle, a head connected thereto', means to supply gas to said head a pressed shut-off valve mounted in said head and actuating devices for said shutoil valve comprising an actuator rod extending through a tight packed joiht into said handle, a nut on said rod, an actuator lever .having itsend pivoted within said handle and having actuating portions engaging said nut, said lever projecting through a slot in said handle.

10. The cutting or Welding blovvpipe comprising a handle, a head connected thereto, means to supply gases to said head, a shutoft' valve, and actuating devices for said shut-olf valve comprising an actuator rod, a projecting actuator lever having its end pivoted Within said handle and having actuating portions loosely coperating with both sides of said rod.

11. The cutting or Welding blovvpipe comprising a handle, a head connected thereto, means to supply gases to said head, a shutolf valve, andactuating devices for said shutoff valve comprising an actuator rod, projecting actuator lever pivoted Within mentes said handle and having actuating portions loosely cooperating with said rod.

l2. A; cutting or welding blowpipe comprising a head, an interchangeable tipremovably mounted in said head and formed with a central shutolf valve seat, a recess in said head substantially in line with said valve seat, avalve plug mounted in said r e cess, a ball valve loosely mounted 1n said l valve plug to cooperate with said valve seat,

said valve plug being provided with an alin said` valve plug being provided with an alining actuating surface engaging said ball valve and substantially' parallel to said valve seat tdpromote the lateral self-alining action of said valve, and coperating actuating devices to operate said valve plug.

lll, A cutting or Welding blovvpipe comprising a head, a tip removably mounted in said head and formed with a valve seat, a

valve plug mounted in said head substam. tially in line with said valve seat, a. hall valve loosely mountedin said valve plugto coperate with saidv valve seat, said'valve plug being provided with an alining actuating surface engaging said hall valve to promote the lateralself-alining action of said valve, and coperating actuating devices to operate said valve plug.

15. A cutting or Welding hlowpipe com.- f-

prising a head, a tip mounted in said head and formed with a valve seat, a ball shut oil' valve loosely mounted in said head suhstantially in line with said valve seat and coperating actuating devices to' operate said valve and allow the lateral self-alining action of said valve.

EDGAR CQMARTN, Witnesses:

Ran C., PALMER, Meer M. Svvlr'n 

